a,
button,
input,
optgroup,
select,
textarea {
  -webkit-tap-highlight-color: rgba(0, 0, 0, 0);
}
/* 移动端定义字体font-family */
body {
  font-family: "Helvetica Neue", Helvetica, sans-serif;
}
input,
textarea {
  appearance: none;
}
a,
img {
  -webkit-touch-callout: none;
}
html,
body,
h1,
h2,
h3,
h4,
h5,
h6,
hr,
p,
iframe,
dl,
dt,
dd,
ul,
ol,
li,
pre,
form,
button,
input,
textarea,
th,
td,
fieldset {
  margin: 0;
  padding: 0;
}
#app {
  display: flex;
  flex-direction: column;
  align-items: center;
}

input {
  border: 0;
  outline: none;
  background-color: rgba(0, 0, 0, 0);
}
